-- A, B, C, D, E, F, G, H, I, J, K, L, M, N.

-- P, Q, R, S, T, U, V, W, X, Y, Z.

Glossary: O.

Obtuse:

Bluntly shaped.

Ochraceous:

The colour ranging from a light orangeish-brown to a pale yellowish-brown.

Oidia:

Spores borne in chains.

Olivaceous:

The colour olive-grey brown.

Overlay:

A condition of the mycelium which has been allowed to completely cover the surface, the condition is caused by any one of the following or combination thereof: prolonged growth temperatures, high levels of COČ and a humidity that has been kept too high. Compare 'matted'.

Ovoid:

Oval-shaped or egg-shaped.

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